Observation of broken time-reversal symmetry in the heavy-fermion superconductor UPt 3
In: Science, Jg. 345 (2014-07-11), S. 190-193
Online
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Zugriff:
The symmetry properties of the order parameter characterize different phases of unconventional superconductors. In the case of the heavy-fermion superconductor UPt$_3$, a key question is whether its multiple superconducting phases preserve or break time-reversal symmetry (TRS). We tested for asymmetry in the phase shift between left and right circularly polarized light reflected from a single crystal of UPt$_3$ at normal incidence, finding that this so-called polar Kerr effect appears only below the lower of the two zero-field superconducting transition temperatures. Our results provide evidence for broken TRS in the low-temperature superconducting phase of UPt$_3$, implying a complex two-component order parameter for superconductivity in this system.
19 pages, 7 figures
Titel: |
Observation of broken time-reversal symmetry in the heavy-fermion superconductor UPt 3
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Autor/in / Beteiligte Person: | Gannon, W. J. ; William P Halperin ; Schemm, Elizabeth ; Wishne, C. M. ; Kapitulnik, Aharon |
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Zeitschrift: | Science, Jg. 345 (2014-07-11), S. 190-193 |
Veröffentlichung: | American Association for the Advancement of Science (AAAS), 2014 |
Medientyp: | unknown |
ISSN: | 1095-9203 (print) ; 0036-8075 (print) |
DOI: | 10.1126/science.1248552 |
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